Displayport link status failed on resume from suspend on eDP on RX580 with Asus GL702ZC

Submitted by Hein-Pieter van Braam

Assigned to Default DRI bug account

Link to original bug (#103700)

Description

Created attachment 135429
dmesg of a suspend/resume cycle.

When resuming from suspend on my Asus GL702ZC the internal eDP screen does not turn back on, neither does the backlight. External screens (normal DP) are not affected and continue working.

I'm running 4.14.0 on this machine. My kernel .config is here in case that is helpful: https://notabug.org/hp/linux-gl702zc/src/master/.config

I see the following errors in dmesg:

[ 1667.119776] [drm:amdgpu_atombios_dp_link_train [amdgpu]] ERROR displayport link status failed
[ 1667.119785] [drm:amdgpu_atombios_dp_link_train [amdgpu]] ERROR clock recovery failed
[ 1667.687497] [drm:amdgpu_atombios_dp_link_train [amdgpu]] ERROR displayport link status failed
[ 1667.687505] [drm:amdgpu_atombios_dp_link_train [amdgpu]] ERROR clock recovery failed

When using drm-next-dc the screen does turn on but the system crashes shortly afterwards. I have not been able to get any meaningful debugging data out of that configuration yet.

Attached is the full dmesg of the system.

Attachment 135429, "dmesg of a suspend/resume cycle.":
dmesg-resume